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. 2014 Dec;58(12):7367–7374. doi: 10.1128/AAC.03730-14

TABLE 1.

Characteristics of multidrug-resistant A. salmonicida subsp. salmonicida isolates harboring a tetracycline resistance gene

Isolatea Antibiotic resistanceb MIC (μg/ml) for tetracyclinec Plasmids foundd
01-B522 SXT, TET, TMP 128 Cryptic, pAsal1, pAsa5, pAsa4-like
07-9324 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
07-7817 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
08-2647 SXT, STR, AMP, TET 16 Cryptic, pAsal1, pAsa5, pSN254-like
07-7287 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
08-2783 STR, AMP, TET 16 Cryptic, pAsal1, pAsa5, pSN254-like
08-4188 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
2009-157K5 STR, TET, ERY 128 Cryptic, pAsal1, pAsa5, pRas3.3
2010-47K18 STR, TET, CHL 128 Cryptic, pAsal1, pAsa5, pRas3.4, pAB5S9-like
2004-05MF26 NAL, SXT, STR, AMP, TET, ERY, GEN, CHL 16 Cryptic, pAsal1, pAsa5, pSN254b
2004-68K52 NAL, SXT, STR, AMP, TET, CHL 64 Cryptic, pAsal1, pAsa5, pSN254-like
2009-195K29 STR, TET, ERY 32 Cryptic, pAsal1, pAsa5, pRas3.3
2009-144K3 SXT, STR, TET, ERY, CHL 256 Cryptic, pAsal1, pAsa5, pRas3.3, pAB5S9b
M15448-11 STR, AMP, TET, CHL 32 Cryptic, pAsal1, pAsa5
M16474-11 STR, AMP, TET, ERY, CHL 32 Cryptic, pAsal1, pAsa5
M14481-11 SXT, STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
M15879-11 SXT, STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
M17739-11 SXT, STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
M13732-11 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
M17053-11 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
M15469-11 STR, AMP, TET, CHL 16 Cryptic, pAsal1, pAsa5, pSN254-like
a

The origin and source of these isolates are given in Table S1 in the supplemental material.

b

NAL, nalidixic acid; SXT, sulfamethoxazole-trimethoprim; STR, streptomycin; AMP, ampicillin; TET, tetracycline; ERY, erythromycin; GEN, gentamicin; TMP, trimethoprim; CHL, chloramphenicol.

c

The MIC of the sensitive 01-B526 isolate was 0.5 μg/ml.

d

The three cryptic plasmids pAsa1, pAsa2, and pAsa3, as well as pAsal1 and pRAS3, were identified in these isolates in a previous study by Trudel et al. (9). The pAsa5, pAsa4-like, pAB5S9-like, and pSN254-like plasmids were found by PCR genotyping in the present study (see Table S2 in the supplemental material).